I agree it's obvious. But I also find it obvious that God when he says final/seal he means it, and doesn't mean the all Prophets are all Prophets type meaning and hence Mohammad (s) is the final one in that sense sort of thing, but really means it for what it means. Also, that the day of judgment refers to the hereafter when things will be shown to every soul and does not refer to a coming of a Prophet.I see Allah makes it simple and it is us that complicates it Link.
By their fruits and prophecies we shall know them. By this standard, the Messengers of Allah are made manifest.
It is thus very obvious why they are not going to be Athiest.
Regards Tony
I'm just saying, by standards that God can deceive us and change his norms, as @InvestigateTruth always emphasizes on, to be consistent, you would have to accept the Maitreya.